M–L relations for O24_ML4h_RA models (f_H = 0.02, f_env = 0.04, η_R = 0.4) with W₀ = 0 (gray lines) and the highest initial rotation rate of W₀ = 0.65 (blue lines), and for models of the O24_ML8h_RA set (with twice as large η_R = 0.8) and W₀ = 0.65, for MW, LMC, and SMC metallicities (Z = 0.014, 0.006, and 0.002 in the left, middle, and right panels, respectively). The theoretical relations are confronted with determinations from A. Gallenne et al. (2018, 2025), B. Pilecki et al. (2018), and N. R. Evans et al. (2024).